Problem with upgrading to 2.10.0 from 2.9.0

[we are the JOE]

So I got tired of waiting for the ubuntu PPA for pidgin to be updated
from 2.9.0 to 2.10.0 (advertised as being behind a couple days --
more like a couple weeks at this point) and decided to compile from
source. (Running ubuntu 10.04)... After installing a dozen or more
prerequisite packages as ./configure demanded them one at a time, i got
make && sudo make install to run without any fatal errors.

However, when running Pidgin now, About displays version 2.10.0, but
libpurple version 2.9.0, and a number of included plugins which have
their version listed as 2.10.0 will not run as a result -- a number of
which I was actually using...

This includes:
- Buddy Ticker
- Buddy Notes
- Conversation Colors
- ExtPlacement
- History
- Iconify on Away
- Message Notification
- Message Timestamp Formats
- Mouse Gestures
- Music Messaging
- Pidgin GTK+ Theme Control
- Pidgin Theme Editor
- Release Notification
- etc

Wtf?  How do I get it to see libpurple as being the current version
(which it should be after installing the newest client?)